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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/ip-filtering.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/ip-filtering.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/ip-filtering.html" rel="nofollow" target="_blank">../en/ip-filtering.html</a></div>
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<span class="breadcrumb-node">Restricting connections with IP filtering</span>
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<div class="chapter xpack">
<div class="titlepage"><div><div>
<h2 class="title">
<a id="ip-filtering"></a>Restricting connections with IP filtering<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a><a class="xpack_tag" href="https://www.elastic.co/subscriptions"></a>
</h2>
</div></div></div>
<p>You can apply IP filtering to application clients, node clients, or transport
clients, in addition to other nodes that are attempting to join the cluster.</p>
<p>If a node’s IP address is on the blacklist, the Elasticsearch security features allow
the connection to Elasticsearch but it is be dropped immediately and no requests are
processed.</p>
<div class="note admon">
<div class="icon"></div>
<div class="admon_content">
<p>Elasticsearch installations are not designed to be publicly accessible
      over the Internet. IP Filtering and the other capabilities of the
      Elasticsearch security features do not change this condition.</p>
</div>
</div>
<h3>
<a id="_enabling_ip_filtering"></a>Enabling IP filtering<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a>
</h3>
<p>The Elasticsearch security features contain an access control feature that allows or
rejects hosts, domains, or subnets.</p>
<p>You configure IP filtering by specifying the <code class="literal">xpack.security.transport.filter.allow</code> and
<code class="literal">xpack.security.transport.filter.deny</code> settings in in <code class="literal">elasticsearch.yml</code>. Allow rules
take precedence over the deny rules.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: "192.168.0.1"
xpack.security.transport.filter.deny: "192.168.0.0/24"</pre>
</div>
<p>The <code class="literal">_all</code> keyword can be used to deny all connections that are not explicitly
allowed.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: [ "192.168.0.1", "192.168.0.2", "192.168.0.3", "192.168.0.4" ]
xpack.security.transport.filter.deny: _all</pre>
</div>
<p>IP filtering configuration also support IPv6 addresses.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: "2001:0db8:1234::/48"
xpack.security.transport.filter.deny: "1234:0db8:85a3:0000:0000:8a2e:0370:7334"</pre>
</div>
<p>You can also filter by hostnames when DNS lookups are available.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: localhost
xpack.security.transport.filter.deny: '*.google.com'</pre>
</div>
<h3>
<a id="_disabling_ip_filtering"></a>Disabling IP Filtering<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a>
</h3>
<p>Disabling IP filtering can slightly improve performance under some conditions.
To disable IP filtering entirely, set the value of the <code class="literal">xpack.security.transport.filter.enabled</code>
setting in the <code class="literal">elasticsearch.yml</code> configuration file to <code class="literal">false</code>.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.enabled: false</pre>
</div>
<p>You can also disable IP filtering for the transport protocol but enable it for
HTTP only.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.enabled: false
xpack.security.http.filter.enabled: true</pre>
</div>
<h3>
<a id="_specifying_tcp_transport_profiles"></a>Specifying TCP transport profiles<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a>
</h3>
<p><a href="modules-transport.html" class="ulink" target="_top">TCP transport profiles</a>
enable Elasticsearch to bind on multiple hosts. The Elasticsearch security features enable you to apply
different IP filtering on different profiles.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: 172.16.0.0/24
xpack.security.transport.filter.deny: _all
transport.profiles.client.xpack.security.filter.allow: 192.168.0.0/24
transport.profiles.client.xpack.security.filter.deny: _all</pre>
</div>
<div class="note admon">
<div class="icon"></div>
<div class="admon_content">
<p>When you do not specify a profile, <code class="literal">default</code> is used automatically.</p>
</div>
</div>
<h3>
<a id="_http_filtering"></a>HTTP filtering<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a>
</h3>
<p>You may want to have different IP filtering for the transport and HTTP protocols.</p>
<div class="pre_wrapper lang-yaml">
<pre class="programlisting prettyprint lang-yaml">xpack.security.transport.filter.allow: localhost
xpack.security.transport.filter.deny: '*.google.com'
xpack.security.http.filter.allow: 172.16.0.0/16
xpack.security.http.filter.deny: _all</pre>
</div>
<h4>
<a id="dynamic-ip-filtering"></a>Dynamically updating IP filter settings<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/x-pack/docs/en/security/using-ip-filtering.asciidoc">edit</a>
</h4>
<p>In case of running in an environment with highly dynamic IP addresses like cloud
based hosting, it is very hard to know the IP addresses upfront when provisioning
a machine. Instead of changing the configuration file and restarting the node,
you can use the <em>Cluster Update Settings API</em>. For example:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT /_cluster/settings
{
    "persistent" : {
        "xpack.security.transport.filter.allow" : "172.16.0.0/24"
    }
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/1262.console"></div>
<p>You can also dynamically disable filtering completely:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT /_cluster/settings
{
    "persistent" : {
        "xpack.security.transport.filter.enabled" : false
    }
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/1263.console"></div>
<div class="note admon">
<div class="icon"></div>
<div class="admon_content">
<p>In order to avoid locking yourself out of the cluster, the default bound
      transport address will never be denied. This means you can always SSH into
      a system and use curl to apply changes.</p>
</div>
</div>
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